-----------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------
---------4----4---------4----4---------4----4---------3-----------4----4----------4----4-------------
---2—--2----2--------------------2—--2----2-------------3-0-2---2----2--------------------------------
------------------3—--3----3--------------------1--—1-----------------------3--—3----3----------------


-------------------------
-------------------------
--------------------------
--2-2-X-X-2-----------
--2-2-X-X-2-----------
--0-0-X-X-0-----------         let ring